SU1367149A1 - Pulsed gate with control signal storage - Google Patents

Abstract

The invention can be used in computer systems, automation. The purpose of the invention is to expand the functionality of the device. The measuring key contains the elements AND-NOT 5 - 8 and the inputs 1 - 3 switching, control and management. pa6oTbV mode. The introduction of the SHS 9 element provides the ability to control the switching of the pulse key by. to one input both in the operation with termination of switching, and without termination of switching. Moreover, the mode of operation is determined by the signal at the input 4 of the pulse key 2 Il. b

Description

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The invention relates to a pulsed technique and can be used in the computational engineering systems, automation, measuring instruments and microelectronics.

The aim of the invention is to extend the functionality by introducing the switching key control capability with a single input (V) both in the switching-off operation mode and without switching the impulse switching when the control signal is changed during the operation of the switched pulse, and the operating mode is determined signal at the additional input (n) of the pulse key.

FIG. 1 shows a circuit diagram of a pulse key with a control signal memorization; Fig. 2 is a timing diagram of the operation of the pulse key with the storage of the control signal.

A pulse key with a memory of the control signal (Fig. 1) contains switching input 1 (c) to which the pulses to be switched are supplied, control input 2 (V), operation mode control input 3 (n), pulse key output 4; the first 5, the second 6, the third 7, the fourth 8 AND-NOT elements, the element OR 9.

Switching input 1 is connected to the first inputs of the first 5 and second 6 I-NOT elements, the outputs of which are connected to the first inputs of the third 7 and 4 8 I-NOT elements, respectively, whose outputs are connected to the second inputs of the corresponding per-4o. 5 and the second 6 IS-NE elements, at the input 2 of the control from 1 to O, the second input of the third IS-NE 7 element during the operation; pulse 15 at the switching input 1, occurs terminating is input 2 of the control of the pulse key. The ipsoid of the element OR 9 is connected to the third input of the second element AND-NO 6, the output of which is the output 4 of the pulse key, the second input of the fourth element AND-NOT 8 is connected to the output of the third element AND-NOT 6, the second input of which is connected to the first input of the element OR 9, the second input of which is the input 3 controlling the operation mode of the pulse key.

On the timing diagram (figure 2) indicated: 10 - pulses at the input 1 switching; 11 - signal at control input 2; 12 - control signal of the pulse key operation mode on

45

50

55

switching, as the third input of the second element AND-NOT 6 will be a signal on. Therefore, the duration of the inverse pulse 16 is equal to the time interval between the beginning of the action (front) of the pulse 15 and the moment of change of the control signal at control input 2.

The pulses 17 and 18 applied to the switching input 1 do not switch to the output 4.

When a pulse 19 arrives at the switching input 1 at the output 4, an inverse pulse 20 is formed, and the change of the control signal 11 at the control input 2 from 1 to

ABOUT

in

input 3; 13 - inverse pulses at the output 4; .14 - 22 - individual pulses of the time diagram.

Pulse key with memory control signal works as follows.

In the initial state of the device, at input 1 there is a signal O, at output 4 there is a signal I, and at the control input V and the input for operating mode control H there can be any signal. When explaining the work, we assume that the inputs V and H have a signal o. 5 Pulse 14, applied to the switching input 1, does not change the signal at output 4, since it prohibits

switching signal O on control input 2 sets signal O

0 at the output of the fourth element IS – NE 8. The setting of the enabling signal 11 1 at the control input 2 during the action of the pulse 14 at the input 1 of the switching does not lead to switching,

5 since for the entire duration of the action of the pulse 14 at the input 1 of the switching, the levels of the signals at the outputs of the AND-NE elements 5-8 do not change.

At the end of the pulse 14

0 at the output of the first element AND-NOT 5 a signal 1 is formed, at the output of the third element AND-NOT 7, and at the output of the fourth element IS-HE 8 h 1 II

one .

A pulse 15 applied to the switching input 1 leads to the formation of an inverse pulse 16 at the output 4, since all three inputs of the second element AND-NOT 6 will have signals 1..

five

five

0

five

switching, as the third input of the second element AND-NOT 6 will be a signal on. Therefore, the duration of the inverse pulse 16 is equal to the time interval between the beginning of the action (front) of the pulse 15 and the moment of change of the control signal at control input 2.

The pulses 17 and 18 applied to the switching input 1 do not switch to the output 4.

When a pulse 19 arrives at the switching input 1 at the output 4, an inverse pulse 20 is formed, and the change of the control signal 11 at the control input 2 from 1 to

ABOUT

in

the duration of the pulse 19 does not stop switching, since the input 3 of the control mode has a signal 1, which through the element. OR 9 enters the third input of the second element AND-NOT 6. Therefore, the duration of the inverse pulse 20 at the output 4 is equal to the pulse duration nineteen.

When a pulse 21 arrives at the switching input 1 at the output 4, an inverse pulse 22 is formed, and the signal 11 at the control input 2 from 1 to 0 during the action of the pulse 21 does not stop switching, however, changing the signal 12 at the control input 3 from 1 on about leads to the termination of switching Therefore, the duration of the inverse pulse 22 at the output 4 is equal to the time interval between the onset of action (front) of the pulse 21 and the instant of the signal change at the input 3 of the control mode of operation.

Pulse key with memorization of control signal 20, containing the first through fourth AND-NOT elements, switching input — connected to the first inputs of the first and second AND-NOT elements, the outputs of which are connected to the first 25 inputs of the third and fourth elements, respectively, AND –NE, respectively which are connected to the second inputs of the first and second elements AND-NOT, the second input of the third element IS-NOT is connected to the control input of the pulse key, the output of the third element IS-NOT is connected to the second input of the fourth element IS-NOT, the output wto element

Thus, in the proposed device, the arrival at the control input 2 of the signal I that permits switching, during the action of the pulse at the input 1 of switching (c) does not lead to switching. The switching condition is the presence of signal 1 at control input 2 at the time of occurrence

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(front) of the pulse at the input 1 of the switch- 35 is connected to the output of the pulse key, which, if at the input 3 is controlled, is characterized by the fact that neither the operating mode has a signal in order to expand the functional

This change in the capability control signal introduced an OR element, the output of which is connected to the third 40 input of the second NAND element, the second input of the third NAND element is connected to the first input of the OR element, the second input of which is the control input of the pulse mode

ABOUT.

on Input 2 during the action of a pulse on the input 1 of switching leads to the termination of switching of a pulse, and if on input 3 of the operating mode control there is a signal 1, then a change in the control signal on input 2

control during the operation of the pulse 45 key.

at the input of the switching does not lead to the termination of switching, that is. The proposed device performs the functions of both a pulse key with a control signal memorization with the cessation of pulse switching when the control signal changes during the action of a pulse at the switching input (the first mode of operation), and a pulse key with control signal memorization without interrupting the pulse switching with a control signal change the time of action of the pulse at the input of the commutation (second mode of operation).

Claims (1)

Invention Formula A pulse key with a memory of the control signal containing the first through fourth AND-NOT elements, a switching input is connected to the first inputs of the first and second AND-NOT elements, the outputs of which are connected to the first inputs of the third and fourth elements, respectively, AND-NOT, the outputs of which are connected to the second inputs of the first and second elements AND-NOT, the second input of the third element AND-NOT connected to the control input of the pulse key, the output of the third element AND-NOT connected to the second input of the fourth element AND-NOT, the output of the second element and NOT , ----, -, .. is connected to the output of a pulse key, characterized in that, in order to expand the functional (pua.Z